I can't answer about $2K plus cables, but HiDiamond's P3 power cords are on a whole another level - maybe two! - beyond the TWLs (10+, 8+), Teresonic and the WyWires silver (Juice 2). I just got a pair of D8 ICs, which are currently on a cooker, but out of the box they were in some ways, such as clarity and tonality, already beyond the Teresonic Clarison silver, which is no slouch. HiDiamond seems to be one of those cords/cables that's hard to be unhappy about. One thing I found about the PCs in my computer system, though, is they don't like to be a minority.
Because of the Euro's run up against the dollar, Robert has finally been forced to give in and raise prices roughly 20% as of April 7 (or whenever the new *retail* price list goes online). Excellent pricing before then - contact him directly - and it won't be terrible afterward given the sound quality.